Autel MaxiSYS CV MS908CV Heavy Duty Diagnostic Scan Tool Full Configuration with all Adapters The MaxiSys CV performs enhanced system diagnostics on more than 60 light, medium, and heavy duty commercial vehicle brands. Read and clear codes, view and graph live data, perform tool-guided maintenance services, complete an array of special functions and diagnose manufacture-specific systems including Allison transmissions, Bendix ABS Brake systems, Detroit Diesel Engines and Eaton and Wabash ABS trailer brakes.